This option sets the default path used by the MCFileManager, this path should always be above the root path otherwise FileManager will treat this as a possible hack attempt and disable all logic. This path will only be used when the user starts up the FileManager when the user goes to a specific directory that path will be used instead.
Path can be relative or absolute.
Example of usage in the config.php file
$mcFileManagerConfig['filesystem.path'] = "/somedir1/somedir2";
Example of usage in the Web.Config file
<add key="filesystem.path" value="/somedir1/somedir2" />
Example of usage in a mc_access file